Dear colleague. I am a bit confused. You say that "In my case, lets suppose i manually provide the router's interfaces with only 64 bit prefixes and not complete global scope 128 bit addresses." Is it mean that you set the prefix information on radvd.conf ? If not, how do you only set the prefix information into a router?
As I know, a router has 2 addresses in IPv6 networks such as link-local address and global address. The global address can be made by manual mode or auto-configuration mode (statless or statful). In this point, the global address has to be a perfect form to communication other node over other subnets. So, I am a bit confused. How do you set only the prefix information on the router in manual mode? Take a look the network configuration file on Linux box (i.e., /etc/network/interface). The file looks like as below: [EMAIL PROTECTED]:/etc/network# cat interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.22.11.52 netmask 255.255.255.0 auto eth1 iface eth1 inet static address 192.168.0.1 netmask 255.255.255.0 iface eth1 inet6 static address 2001:0220:1404::1 netmask 64 auto eth2 iface eth2 inet static address 192.168.1.1 netmask 255.255.255.0 iface eth2 inet6 static address 2001:0220:1404:1::1 # address 2001:0220:1404:1::/128 netmask 64 [EMAIL PROTECTED]:/etc/network# So, when you use the manual mode to config the address information on the router, you have to provide whole address information. The only prefix information to set could be used for auto-configuration. I hope it is useful to you. Cheers. On 7/5/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Dear Lee, Thanks for your reply but can you please clarify or elaborate more the last sentence "Also, even though you only set a prefix information into a router in the network, the router will make a global address if there is another router sending router advertisement message." You are right that i am talkign about stateless autoconfiguration which the router also uses to form Link-local address, but my question is regarding the global scope address of the router. The specs say that routers are assigned addresses (except link-local) either manually or by an external means. In my case, lets suppose i manually provide the router's interfaces with only 64 bit prefixes and not complete global scope 128 bit addresses. Then in that case would it be legal for the router to statelessly auto-configure its 128 bit global scope address by combining the manually provided prefixes with the MAC48 interface identifier as specified in RFC 2462? Zarrar ________________________________ > Date: Thu, 5 Jul 2007 01:11:11 +0900 > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > Subject: Re: [mipl] Autocnfiguration for Routers in IPv6 > CC: [email protected] > > Dear colleague. > The address configuration methods in IPv6 are normally divided into two. One is a stateless auto-configuration (RFC 2462) and other thing is a stateful auto-configuration (RFC 3315). Well, actually, the stateless auto-configuration is done by router advertisement message sent from a router and the statefult auto-configuration is done by DHCPv6 server that nodes obtain the address configuration information with DHCP procedures. > Your question must be about the stateless auto-configuration. A router in the network would have its IPv6 address (network prefix + other) and then the router periodically sends router advertisement message to all node in the network. The router advertisement message includes the prefix information and the address configuration information. In the case that the router only has a link-local adress, the router advertisement message would be wrong because the link-local address cannot be sent as the prefix information in the router advertisement message. > Also, even though you only set a prefix information into a router in the network, the router will make a global address if there is another router sending router advertisement message. > Cheers. > On 7/4/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Dear all, > Thankyou for detailed replies regarding my previous question about the need to perform DAD. > Another question is regarding the auto-configuration of Routers in an IPv6 network. > >From RFC 2462 and also i read somewhere that "With the exception of link-local addresses, address auto-configuration is only specified for HOSTS (and by implication not for routers). Routers must obtain address configuration parameters through another means (for example, manual configuration)". > Because every router interface (except loopback ofcourse) should have a global-scope IPv6 address which the MN will use as destination address in BU during Home registration process in MIPv6, so if I manually provide ONLY prefixes to an IPv6 router, then can't the router perform auto-configuration to form a global-scope address from this manually assigned prefix(es)? > Clarification would be appreciated. > Zarrar > _________________________________________________________________ > Don't get caught with egg on your face. Play Chicktionary! > http://club.live.com/chicktionary.aspx?icid=chick_wlmailtextlink > _______________________________________________ > mipl mailing list > [email protected] > http://www.mobile-ipv6.org/cgi-bin/mailman/listinfo/mipl > -- > Internet Management Technology Lab, Sungkyunkwan University. > Jong-Hyouk Lee. > #email: jonghyouk (at) gmail (dot) com > #webpage: http://www.hurryon.org _________________________________________________________________ Local listings, incredible imagery, and driving directions - all in one place! Find it! http://maps.live.com/?wip=69&FORM=MGAC01
-- Internet Management Technology Lab, Sungkyunkwan University. Jong-Hyouk Lee. #email: jonghyouk (at) gmail (dot) com #webpage: http://www.hurryon.org
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